- Černý MSS - Jaroslav Černý Collection
- Černý MSS 21 - Correspondence
- 163 more...
- Lexa - Černý MSS 21.104, 1342-8, 2183 - Lexa, František - correspondence
- Lisowska - Černý MSS 21.1349 - Lisowska, Julia - correspondence
- Lisowyi - Černý MSS 21.1350-2 - Lisowyi, George - correspondence
- Lockhart - Černý MSS 21.1-5, 1353, 2178-9 - Lockhart, R. D. - correspondence
- Logan - Černý MSS 21.1354 - Logan, Sir Douglas William - correspondence
- Lourie - Černý MSS 21.1355-9 - Lourie, Izidor Mikhailovitch - correspondence
- Lowe - Černý MSS 21.1360 - Lowe, John - correspondence
- Lucas - Černý MSS 21.105 - Lucas, A. - correspondence
- Luddeckens - Černý MSS 21.1360A - Lüddeckens, Erich - correspondence
- 136 more...